Reddit reviews PTFE Teflon tubing 5ft- 2mm ID X 4mm OD for 1.75 Filament Bowden 3D Printer -Allen Tech PTFE Teflon Tube
We found 5 Reddit comments about PTFE Teflon tubing 5ft- 2mm ID X 4mm OD for 1.75 Filament Bowden 3D Printer -Allen Tech PTFE Teflon Tube. Here are the top ones, ranked by their Reddit score.
ID:2mm(0.079'')/OD:4mm(0.158''),Length:5ft.Material: PTFE(common name:Teflon).For 1.75 filament Bowden 3D Printer,TranslucentTemperature range (Degree F):-454 to 500. Flame rating: UL-224 VW-1(UL-recognized). Density: 2.15-2.20 g/cm3.Excellent resistant to acids, alkali and all kinds of organic solvents: ASTM D543. High lubricating ability and non-stickRaw materials meet FDA requirements per FDA 21 CFR 177.1550 for use with food contact surfacesExcellent electric property and long life. Widely used in electronics, chemicals, medical and industrial
Depending if there is enough left you can pull out the remaining, cut it clean and reinsert it. Otherwise you will need a new tube.
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https://www.amazon.com/Teflon-tubing-Filament-Printer-Tech/dp/B073RDFTDV/ref=sr_1_5?keywords=bowden+tube&qid=1562686568&s=gateway&sr=8-5
I built a dry box that I keep my PLA in and feed directly to the printer using PTFE tubing.
https://imgur.com/rrc30HL
https://imgur.com/ZxHDLQX
I used the threaded rod holders from this
https://www.thingiverse.com/thing:961881
And the Filament feeders from here
https://www.thingiverse.com/thing:1750875
I also keep one of these in there as well to keep it dry.
https://www.homedepot.com/p/Eva-Dry-4-6-oz-Mini-Dehumidifier-E-333/202847328
Also, I used this PTFE tubing for the runs from the box.
https://www.amazon.com/gp/product/B073RDFTDV/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
AFAIK, the distinguishing characteristics of a current Mk10 nozzle are a 7x1mm thread and a 4mm bore. Performance 3D makes excellent nozzles and pretty much any generic brass Mk10 should work okay. There was an earlier rev nozzle that was for a 3mm OD x 2mm ID tubing and which had M6 threads. Only way to be sure is to measure but unless you have a fairly old FFC (e.g., laser cut case) it's probably the M7 & 4mm style.
For the PTFE tube, recommend buying a length of 4mm OD x 2mm ID PTFE tubing and cutting your own. Cheaper in the long run and you can cut it to the right length. When the PTFE tube is inserted inside the thermal barrier tube and nozzle there should be a narrow gap, about a fingernail's thickness, between the nozzle and tube. That ensures that the PTFE tube will fully seat once it's all assembled. One example of many.
Well depends I found this one fairly cheap on amazon and you can cut to length.
Amazon Link
I never really had to buy one but I’ve done research seeing if there were better alternatives but they all seem the same to me.
About your clog problem though instead of seeing if it’s a physical issue see if your retraction settings are maybe either too slow, too fast, or the distances are skewed and the optimal retraction is not happening.
No problem! A clarification to what u/Seppi449 said; I'm assuming they're actually talking about a hardened steel nozzle. This will allow the students to print with exotic filaments (wood fill, metal fill, glow in the dark, etc) without it damaging the soft brass nozzle. This upgrade is pretty cheap, and it will prevent constant replacements.
I personally would not recommend upgrading to an all metal hotend assembly. The uses for that are pretty small and they can cause a lot more issues for novice users, which I'm guessing many of the students are. When you get a new nozzle, make sure it doesn't specify it's for an all metal hotend. They are different and are not compatible.
You probably ought to also grab a bit of 2mm ID x 4mm OD teflon tubing. You need to replace the little bit of teflon tubing inside the hot end assembly periodically to help prevent jams and keep your printing smooth. The replacement piece is only about 1" long, so a roll like that will last forever. When you replace the existing tube, you want to make sure to keep the length as close to the original as possible, and keep your cuts 90º.
I hope this helps!